
Tried this bottle both cold and hot - clear winner was cold - hot action wasn't bad - tried it with home made coffee - coffee was delicious and hot after 2 hours - but - brewed coffee still spoils after 40 minutes - that's why - Tim Horton changes coffee pots every 40 minutes - so coffee was hot - taste wasn't great - NO bottle problem - just coffee. Cold test bike drink mix used - no problem after 4 hours of Texas heat - clear - I didn't drop the bottle on the blanket in bright sunlight - no - bottle was in my cup holder and we went for a walk - soooo not really quite a hot test roast/ full sunlight - but - I think this brand will work just as well as "other" big brands. I choose this brand based on the design of the bottle - it looks like a breaking wave on the shore. looks really cool.

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